[chanalku91]

have you tried to clean up your phone?
check if there are any other physical is bothering the 3.5?

I've done flashing many times and call into the workshop

the result is nil! no operator factor!

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If you buy VIVO then only make selfies .. nothing aspect more from this machine. because it has poor hardware. not only 3G even Wifi network signals are too poor to receive.

My house 10 meters from the signal transmitter tower may not be a full signal suddenly arrived to 2/3 bar only